6		3
				1
							8
2	1		7			6
	3			4		7	5
7
			3
8		1

Difficulty: Easy (0)

				4		7
					8		2
		5	2		1
	7						3
1						5
		7		6	3
7		3
	6		5

Difficulty: Very easy (0)

		5	1
							6
					4		2
6				5	7
		3	6				8
5		8
7
				6	1

Difficulty: Easy (0)

	6
				5	1
	5			3	8		2
					6
		3
2		5	7			3
		2	4
						6

Difficulty: Easy (0)